Vision training eyewear include lenses having a plurality of obscuration zones. The obscuration zones are individually switchable to provide light emission or attenuation that can interfere with normal vision of the wearer. A pattern or sequence of patterns can be selectively activated at a fixed or...http://www.google.com.au/patents/US7828434?utm_source=gb-gplus-sharePatent US7828434 - Zone switched sports training eyewear
